In this Project, we will see about how to Make a simple 24x8 Scrolling LED Matrix in Home.
Circuit Diagram:
Arduino Code:
scrolling_led_matrix_24x8.ino
//Change your Name at Line.115 #define BA{B00111100,B01000010,B01000010,B01000010,B01111110,B01000010,B01000010,B01000010} #define BB{B01111100,B01000010,B01000010,B01111100,B01000010,B01000010,B01000010,B01111100} #define BC{B00111100,B01000010,B01000000,B01000000,B01000000,B01000000,B01000010,B00111100} #define BD{B01111000,B01000100,B01000010,B01000010,B01000010,B01000010,B01000100,B01111000} #define BE{B01111110,B01000000,B01000000,B01111100,B01000000,B01000000,B01000000,B01111110} #define BF{B01111110,B01000000,B01000000,B01111100,B01000000,B01000000,B01000000,B01000000} #define BG{B00111100,B01000010,B01000000,B01000000,B01001110,B01000010,B01000010,B00111100} #define BH{B01000010,B01000010,B01000010,B01111110,B01000010,B01000010,B01000010,B01000010} #define BI{B01111100,B00010000,B00010000,B00010000,B00010000,B00010000,B00010000,B01111100} #define BJ{B00111110,B00001000,B00001000,B00001000,B00001000,B00001000,B01001000,B00110000} #define BK{B01000100,B01001000,B01010000,B01100000,B01100000,B01010000,B01001000,B01000100} #define BL{B01000000,B01000000,B01000000,B01000000,B01000000,B01000000,B01000000,B01111110} #define BM{B10000010,B11000110,B10101010,B10101010,B10010010,B10010010,B10000010,B10000010} #define BN{B01000010,B01100010,B01010010,B01010010,B01001010,B01001010,B01000110,B01000010} #define BO{B00111100,B01000010,B01000010,B01000010,B01000010,B01000010,B01000010,B00111100} #define BP{B01111100,B01000010,B01000010,B01000010,B01111100,B01000000,B01000000,B01000000} #define BQ{B00111100,B01000010,B01000010,B01000010,B01000010,B01000010,B01000100,B00111010} #define BR{B01111100,B01000010,B01000010,B01111100,B01010000,B01001000,B01000100,B01000010} #define BS{B00111100,B01000010,B01000000,B00110000,B00001100,B00000010,B01000010,B00111100} #define BT{B01111100,B00010000,B00010000,B00010000,B00010000,B00010000,B00010000,B00010000} #define BU{B01000010,B01000010,B01000010,B01000010,B01000010,B01000010,B01000010,B00111100} #define BV{B01000100,B01000100,B01000100,B01000100,B01000100,B01000100,B00101000,B00010000} #define BW{B10000010,B10000010,B10000010,B10000010,B10010010,B10010010,B10101010,B01101100} #define BX{B10000010,B10000010,B01000100,B00101000,B00010000,B00101000,B01000100,B10000010} #define BY{B10000010,B10000010,B01000100,B00101000,B00010000,B00010000,B00010000,B00010000} #define BZ{B01111110,B00000010,B00000100,B00001000,B00010000,B00100000,B01000000,B01111110} #define LA{B00000000,B00000000,B00000000,B00111000,B00000100,B00111100,B01000100,B00111000} #define LB{B01000000,B01000000,B01000000,B01000000,B01111000,B01000100,B01000100,B01111000} #define LC{B00000000,B00000000,B00000000,B00111100,B01000000,B01000000,B01000000,B00111100} #define LD{B00000100,B00000100,B00000100,B00000100,B00111100,B01000100,B01000100,B00111100} #define LE{B00000000,B00000000,B00000000,B00111000,B01000100,B01011000,B01000000,B00111100} #define LF{B00111000,B01000100,B01000000,B01000000,B01111000,B01000000,B01000000,B01000000} #define LG{B00111000,B01000100,B01000100,B01000100,B00111000,B00000100,B00000100,B01111000} #define LH{B01000000,B01000000,B01000000,B01111000,B01000100,B01000100,B01000100,B01000100} #define LI{B00000000,B00000000,B00010000,B00000000,B00010000,B00010000,B00010000,B00010000} #define LJ{B00000000,B00001000,B00000000,B00001000,B00001000,B00001000,B01001000,B00110000} #define LK{B00000000,B01000000,B01000000,B01001000,B01010000,B01100000,B01010000,B01001000} #define LL{B00100000,B00100000,B00100000,B00100000,B00100000,B00100000,B00100000,B00011000} #define LM{B00000000,B00000000,B00000000,B01000000,B01101100,B01010100,B01000100,B01000100} #define LN{B00000000,B00000000,B00000000,B01000000,B01111000,B01000100,B01000100,B01000100} #define LO{B00000000,B00000000,B00000000,B00111000,B01000100,B01000100,B01000100,B00111000} #define LP{B00000000,B00000000,B00111000,B01000100,B01000100,B01111000,B01000000,B01000000} #define LQ{B00000000,B00000000,B00111000,B01000100,B01000100,B00111100,B00000100,B00000100} #define LR{B00000000,B00000000,B00111000,B01000100,B01000000,B01000000,B01000000,B01000000} #define LS{B00000000,B00000000,B00111000,B01000100,B01100000,B00011100,B01000100,B00111000} #define LT{B00100000,B00100000,B00100000,B01111000,B00100000,B00100000,B00100000,B00011000} #define LU{B00000000,B00000000,B00000000,B01000100,B01000100,B01000100,B01000100,B00111100} #define LV{B00000000,B00000000,B00000000,B01000100,B01000100,B01000100,B00101000,B00010000} #define LW{B00000000,B00000000,B00000000,B01000100,B01000100,B01010100,B01010100,B00111000} #define LX{B00000000,B00000000,B00000000,B01000100,B00101000,B00010000,B00101000,B01000100} #define LY{B00000000,B00000000,B00000000,B01000100,B01000100,B00111100,B00000100,B01111000} #define LZ{B00000000,B00000000,B00000000,B01111100,B00000100,B00111000,B01000000,B01111100} #define SPACE{B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B00000000} #define NUM0{B00111100,B01000010,B01000110,B01001010,B01010010,B01100010,B01000010,B00111100} #define NUM1{B00011000,B00111000,B00011000,B00011000,B00011000,B00011000,B00011000,B00111100} #define NUM2{B00111100,B01000010,B00000010,B00000010,B00001100,B00110000,B01000000,B01111110} #define NUM3{B00111100,B01000010,B00000010,B00000010,B00011100,B00000010,B01000010,B00111100} #define NUM4{B01000010,B01000010,B01000010,B01000010,B00111110,B00000010,B00000010,B00000010} #define NUM5{B01111110,B01000000,B01000000,B01111100,B00000010,B00000010,B01000010,B00111100} #define NUM6{B01111110,B01000000,B01000000,B01000000,B01111110,B01000010,B01000010,B01111110} #define NUM7{B01111110,B00000010,B00000100,B00000100,B00001000,B00001000,B00010000,B00010000} #define NUM8{B00111100,B01000010,B01000010,B01111110,B01000010,B01000010,B01000010,B00111100} #define NUM9{B01111110,B01000010,B01000010,B01111110,B00000010,B00000010,B01000010,B01111110} #define DEVIDE{B00000100,B00000100,B00001000,B00001000,B00010000,B00010000,B00100000,B00100000} #define TWODOTS{B00000000,B00011000,B00011000,B00000000,B00000000,B00011000,B00011000,B00000000} #define DOT{B00000000,B00000000,B00000000,B00000000,B00000000,B00000000,B01100000,B01100000} #define COMA{B00000000,B00000000,B00000000,B00000000,B00000000,B00110000,B00110000,B01100000} #define LINE{B00000000,B00000000,B00000000,B01111110,B01111110,B00000000,B00000000,B00000000} #define QUASTION{B00111000,B01000100,B00000100,B00000100,B00001000,B00010000,B00000000,B00010000} #define MARK{B00011000,B00011000,B00011000,B00011000,B00011000,B00000000,B00011000,B00011000} /* #define LESSTHAN #define GRATTHAN #define AT #define POUND #define DOLLAR #define PERCENT #define CARAT #define AND #define ASTERISK #define LPARENTH #define RPARENTH #define HYPHEN #define UNSCORE #define PLUS #define EQUALS #define DASH #define LBRACKET #define RBRACKET #define SYM[ #define SYM] #define SYM| #define SYM\ #define SYM` #define SYM~ #define SYM; #define SYM: */ int latchPin = 10; int clockPin = 13; int dataPin = 11; int clock = 9; int Reset = 8; int latchPinPORTB = latchPin - 8; int clockPinPORTB = clockPin - 8; int dataPinPORTB = dataPin - 8; int i = 0; long scrolling_word[16]; int array_turn=0; byte your_text[60][8]={BS,BD,LE,LV,SPACE,BE,LL,LE,LC,LT,LR,LO,LN,LI,LC,LS};//CHANGE YOUR TEXT HERE void setup(){ Serial.begin(9600); pinMode(dataPin,OUTPUT); pinMode(clockPin,OUTPUT); pinMode(latchPin,OUTPUT); pinMode(clock,OUTPUT); pinMode(Reset,OUTPUT); digitalWrite(Reset,HIGH); digitalWrite(Reset,LOW); setupSPI(); } void display_word(int loops,byte word_print[][8],int num_patterns,int delay_langth){// this function displays your symbols i = 0;// resets the counter fot the 4017 for(int g=0;g<8;g++)//resets the the long int where your word goes scrolling_word[g] = 0; for(int x=0;x<num_patterns;x++){//main loop, goes over your symbols // you will need to find a better way to make the symbols scroll my way is limited for 24 columns for(int r=0;r<8;r++)//puts the buildes the first symbol (also controls how many columns are displayed) scrolling_word[r] |= word_print[x][r]; for (int z=0;z<8;z++){//the scrolling action (Z is also pretty much a kerning variable- larger vale = more space between letters) for(int p=0;p<8;p++) scrolling_word[p] = scrolling_word[p] << 1; // end of the scrolling funcion for(int t=0;t<delay_langth;t++){// delay function, it just loops over the same display for(int y=0;y<8;y++){// scaning the display if(i == 8){// counting up to 8 with the 4017 digitalWrite(Reset,HIGH); digitalWrite(Reset,LOW); i = 0; } latchOff(); spi_transfer(make_word(0x01000000,y));// sending the data spi_transfer(make_word(0x00010000,y)); spi_transfer(make_word(0x00000100,y)); latchOn(); delayMicroseconds(800);//waiting a bit latchOff(); spi_transfer(0);// clearing the data spi_transfer(0); spi_transfer(0); latchOn(); digitalWrite(clock,HIGH);//counting up with the 4017 digitalWrite(clock,LOW); i++; } } } } finish_scroll(delay_langth); } void finish_scroll(int delay_scroll){// this function is the same as the funcion above, it just finishing scrolling for (int n=0;n<24;n++){ for(int h=0;h<8;h++) scrolling_word[h] = scrolling_word[h] << 1; for(int w=0;w<delay_scroll;w++){ for(int k=0;k<8;k++){ if(i == 8){ digitalWrite(Reset,HIGH); digitalWrite(Reset,LOW); i = 0; } latchOff(); spi_transfer(make_word(0x01000000,k)); spi_transfer(make_word(0x00010000,k)); spi_transfer(make_word(0x00000100,k)); latchOn(); delayMicroseconds(800); latchOff(); spi_transfer(0); spi_transfer(0); spi_transfer(0); latchOn(); digitalWrite(clock,HIGH); digitalWrite(clock,LOW); i++; } } } } byte make_word (long posistion,byte turn){ byte dummy_word = 0; for(int q=0;q<8;q++){ if(scrolling_word[turn] & (posistion<<q)) dummy_word |= 0x01<<q; } return dummy_word; } void loop() { display_word(1,your_text,20,15);// calls for the display_pattern function and says that int loop = 15(if you do more loop the pattern whould scrole slower). // the seconds variable in this (20 in this case), controls how many letters your display can hold at one time. } void latchOn(){ bitSet(PORTB,latchPinPORTB); } void latchOff(){ bitClear(PORTB,latchPinPORTB); } void setupSPI(){ byte clr; SPCR |= ( (1<<SPE) | (1<<MSTR) ); // enable SPI as master //SPCR |= ( (1<<SPR1) | (1<<SPR0) ); // set prescaler bits SPCR &= ~( (1<<SPR1) | (1<<SPR0) ); // clear prescaler bits clr=SPSR; // clear SPI status reg clr=SPDR; // clear SPI data reg SPSR |= (1<<SPI2X); // set prescaler bits //SPSR &= ~(1<<SPI2X); // clear prescaler bits delay(10); } byte spi_transfer(byte data){ SPDR = data; // Start the transmission while (!(SPSR & (1<<SPIF))){}; // Wait the end of the transmission return SPDR; // return the received byte, we don't need that }
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